4221430331 has 4 divisors (see below), whose sum is σ = 4222075872. Its totient is φ = 4220784792.

The previous prime is 4221430321. The next prime is 4221430403. The reversal of 4221430331 is 1330341224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4221430331 - 2²² = 4217236027 is a prime.

It is a super-2 number, since 2×4221430331² = 35640948078973539122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221430297 and 4221430306.

It is not an unprimeable number, because it can be changed into a prime (4221430321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312860 + ... + 326073.

It is an arithmetic number, because the mean of its divisors is an integer number (1055518968).

Almost surely, 2^4221430331 is an apocalyptic number.

4221430331 is a deficient number, since it is larger than the sum of its proper divisors (645541).

4221430331 is an equidigital number, since it uses as much as digits as its factorization.

4221430331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645540.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 4221430331 is about 64972.5352052696. The cubic root of 4221430331 is about 1616.1681434841.

Adding to 4221430331 its reverse (1330341224), we get a palindrome (5551771555).

The spelling of 4221430331 in words is "four billion, two hundred twenty-one million, four hundred thirty thousand, three hundred thirty-one".